FKANT Bluetooth Neckband Headset Super Long Battery Life Sweatproof Wireless Headphones with MIC and Retractable Earbuds for iPhone Samsung HTC Smartphones Unique Design: NECKBAND style, comfortable all-day wearing experience, lightweight and flexible. Black one with smooth coating, great touch feeling; White one with mirror surface, elegant and low-profile. FOLDABLE design, easy for you to store in pocket or bag. RETRACTABLE earbuds with individual button on each side, one press to retract earbuds, offering you maximum convenience. Advanced Technology: Latest CSR Bluetooth V4.1 chipset, faster connection and lower power consumption. Effective transmission distance up to 33 feet/ 10 meters (Depend on environment), allows you to hands-freely answer the phone call. CVC 6.0 noise canceling technology, ensures that you could talk clearly with your friend/family via build-in MIC. New Lifestyle between Sport and Music: The headset deliveries enhanced audio and bass response, you will enjoy great stereo sound while you are doing workout or running. What's more, the headphones support to connect TWO Bluetooth devices simultaneously, support Answer / End a call via CALL button, support voice prompt., support VIBRATING boot, in-coming phone number reporting and Vibrating Call Alert; Support Volume +/- , Previous/Next song. Long Battery Life: Build-in 195mAh rechargeable Li-Polymer battery, talking time up to 18Hrs, music playing time up to 16Hrs, standby time up to 300Hrs after fully charged (Depend on volume). Charging time, less than 3.5Hrs. Complete Compatibility: Free access to all most of Bluetooth devices, such as iPhone 6s Plus / 6s, iPhone 6 Plus / 6, iPhone 5s / 5, iPhone 4s /4 , iPad Air / iPad Mini; Samsung Galaxy S6 Edge Plus / S6 Edge / S6 / S5, Note 5/ 4 /3 /2, Samsung Tablets ; LG G4 /G3 ; HTC A9 / M9 / M8 / M7 ; Google Nexus 6P, etc.